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Flexible design of a rock slope abutment at the Wuqiangxi Hydroelectric Power Station

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Abstract

This paper presents the results of the real-time monitoring of a rock slope at the abutment of the Wuqiangxi Hydroelectric Power Station, Hunan Province, China, and the ensuing modifications of the original design and excavation process. Monitoring sites were carefully selected based on information collected on geological features (for example, faults) and from the results of numerical modelling. A flexible approach to the design was taken, using feedback from the monitoring system which allowed (1) time to set up support/remedial measures during the work and (2) a reduction in the use of pre-stressed anchored cables. As a consequence, the work was successfully carried out with cost savings and no safety problems.

Résumé

Cet article présente les résultats d’auscultation d’une pente rocheuse au niveau d’ouvrages de soutènement pour la centrale hydroélectrique de Wuqiangxi (province de Hunan, Chine). Cette surveillance en temps réel a permis des modifications du projet initial et des procédés d’excavation. Les sites instrumentés ont été soigneusement choisis en fonction du contexte géologique et des failles présentes, tout en prenant appui sur des résultats de simulation numérique. Une conception d’ouvrage capable d’adaptation a été définie, utilisant les informations en retour de l’auscultation, ce qui a permis a) de mettre en oeuvre des mesures de soutènement en temps voulu et b) de limiter l’utilisation de câbles précontraints. En conséquence, les travaux ont été réalisés avec succès, des économies étant réalisées et les problèmes de sécurité maîtrisés.

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Acknowledgements

The authors would like to express their sincere thanks to Mr. C.M. Wang, Mr. J. Wang, and Mr. Y.M. Yue for their help. This study was financially supported by the Chinese Natural Scientific Committee (Project No. 40102024) and also by the Brain Korea 21 Project in 2004 and by the Research Institute of Engineering Science, Seoul National University, Korea.

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Authors and Affiliations

  1. Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China

    Yanjun Shang, Zhifa Yang & Da’an Liu

  2. School of Civil, Urban & Geosystem Engineering, Seoul National University, 151-744, Seoul, South Korea

    Hyeong-Dong Park

  3. Mid-South Institute for Design of Hydroelectric Projects, Ministry of Electric Power, 410014, Changsha, China

    Chunhua Tang

Authors
  1. Yanjun Shang
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  2. Hyeong-Dong Park
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  3. Zhifa Yang
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  4. Da’an Liu
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  5. Chunhua Tang
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Corresponding author

Correspondence to Hyeong-Dong Park.

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Shang, Y., Park, HD., Yang, Z. et al. Flexible design of a rock slope abutment at the Wuqiangxi Hydroelectric Power Station . Bull Eng Geol Environ 65, 281–288 (2006). https://doi.org/10.1007/s10064-005-0014-1

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  • DOI: https://doi.org/10.1007/s10064-005-0014-1

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